Effects of surface modification of halloysite nanotubes on the morphology and the thermal and rheological properties of polypropylene/halloysite composites

• DOI: 10.1515/polyeng-2017-0025
• Publication Date: 2017-05-03T10:01:41Z
• Authors: Xiaochun Yin; Liang Wang; Sai Li; Guangjian He; Zhitao Yang
• Keywords: Halloysite; Polypropylene; Thermal Stability

Abstract Effects of unmodified halloysite nanotubes (HNTs) and hexadecyl trimethyl ammonnium bromide treated (CTAB-HNTs) on the morphology as well thermal rheological properties HNT-filled polypropylene (PP) composites were investigated. The melt-blended with a novel vane mixer dominated by extensional deformation. Fourier transform infrared spectroscopy demonstrated that ammonium molecules successfully interacted groups. Compared HNTs, modified HNTs had better dispersion in PP matrix. degree crystallinity increased introduction into Thermal analyses revealed CTAB-HNTs can improve composites’ stability compared HNTs. As for dynamic shear rheology, PP/CTAB-HNT showed higher viscoelaticity than neat most frequency regimes, raw HNT/PP presented opposite phenomenon. relaxation time melt availability heterogeneous domains presence CTAB-HNTs.